Marking pen



FIG. 1 is a perspective view of a marking pen showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a front view thereof, with the writing tip exposed and the cap member in stored position; and,

FIG. 8 is a sectional view taken along 8—8 in FIG. 2. 

The ornamental design for a marking pen, as shown and described. 